Controller for door-motors.



WITNESSES:

J. F. McELROY.

CONTROLLER FOR DOOR MOTORS. I

APPUCAUON HLED JUNE 29. 1912.

2 SHEETS-SHEET l.

IN VENTOR ATTY Patented July 13, 1915.

L F McELROY.

CONTROLLER FOR DOOR MOTORS.

' APPLICATION FILED JUNE 29. 1912. 1,145,91 1 Patented July 13, 1915.

. 2 sREETs-sREET 2i umwx - 3 3 R r w j WITNESSES: INVENTOR Z. J: 45W Y/QAQW/w a.cla.pted to remain 'circult Without being injured by heat and either of its JAMES F. MQELROY, 0F ALBANY, NEW YORK. ASSIGNOE T8 CONSOLIDATED GAE HEATING COMPANY. A CORPORATION OF WEST VIRGINIA.

enplication filed June :29,

1 o (ZZZ whom air in any concern lie it known that I, JAMES F. MGELROY, a

citizen of the United States. residing at Alonny, county of Alhsny, State of New York, have invented certain. new and useful Improvements in Controllers for Door- Motors, the following being a full, clear and exact disclosure of the one form of my invention which I at present deem preferable.

For a detailed description of the present form of my invention, reference may be had to the following specification and to the accompanying drawings, which illustrate my invention, wherein- Figure l is a. diagrammatic illustration of my invention; Fig. 2 is a vertical section of my controlling switch, and Fig. 3 is a front elevation thereof; Fig. i shows the sin plemenhwy contacts of the switch, and Fig. 5 is a transverse section of the switch.

My invention relates to the control of pneumatic door motors by electromagnetic devices and, more specifically, involves devices for controlling the rnotor from two distinct points. such as the two ends of :1 car when the apparatus is employed for operating car ooors. Themotor thus controlled is a double acting, reciprocating motor, and for each end thereof there is 2. separate spring-closed admission port. Distinct electromzignets are provided for open ing these admission ports egsinst the force or" the spring, tending to close them, these magnets being ofclosecl-circuit construction indefinitely on closed thereby capable of maintaining the-air pressure on-the motor so long as the door is in extreme positions. These two magnets are controlled by two switches placed at diiierent distant points of control, l its current throiigh contacts controlled by whereby when either switch is in its doorclosing position the other switch may be used to either close or open the door.

Referring to Fig. i, the .door to be spo oted is indicated at D and is connected by link 7 to the connected crossheeds 5 and G of it Well known form of door motor shown in detail in my Patent No. 1,002,596. dated September 5, 1911) wherein the admission of air pressure to the righthand end of cylinder 1 will move the said door and cross heads to the left to open the door, while the Specification of Letters Patent.

the opposite switch,

Patented 91?. Serial l lo. 796,739.

admission of air end of cylinder and crosshends to the opposite end course. open to the pressure to the left hand willinove the said door? the right to close the door. in each case being. or" atmosphere. The pipes 11 and 12 leading to the respective crlimlers are controlled by magnetic valves Ii until) of which the latter gether with its magnet The other is a duplicate of the one so illustrated. in brief, the energizing of magnet C;\'ill force down a rod 32 passing through the magnet core 33, which rod embraces the end oi the stein of puppet Valve 26 and :ittFliO depress the valve against the force of its seating spring 22, thereby opening the mluiission port and allowing air to liow from supply pipe through branch 1% and through the admission port which is thus opened into pipe 12 and cylinder 2. lit the snmc time the lower end of rod closes the outlet port lending to exhaust duct 27. inc dei norgizing of the magnet produces the rev econditions, shutting the admission port and opening the exhaust port. The valve ii is a dnplionto of B and is Worked i1 he same manner by magnet C Each ignet has its coil 31- pocketed between or $33 and magnetic shell said shell being surmounted by a screw on within which the armsture disk 36 that. bridges fr- H ore to shell but is nornmllf. held away efrmn by a spring 37. This form of magnet will operetc to open the valve and maintain it open With a. minute amount or" current and is therefore adapted to remain indefinitely on closed circuit Without injury so as to mnintain the air pressure on the door so long as the door remains in its closed position.

E and E are two switches placed at sepzr rate points of control, such as the two ends of a car, assuming the door I) to he a car door. Each switch contains an operating switch blade or lever 41 pivoted on its base to s metal lolock -20. The blade ll plays between two fixed contac s and 43 when engaging Contact 43;1? also forces together two contact springs and 16 (seenlso 3 and l} means of an insulating block s7 riveted to blade l hen the blade is moved away from contact 43, the springs 45 and 46 tend to separate from each other and break the circuit in which they are included. As appears in Figs. 2 and 5, the contact 43 is provided on its upper contact surface is shown in detail to- .port 27 of cylinder 2.

with a notch or recess into which the blade 41 springs and seats itself and is thereby locked to the contact and can only be re moved therefrom by being lifted up out of the notch preparatory to moving it to the left away from the contact 43.

One wire leading from the terminalot the battery or source of current F branches at (31 to the two magnets C and C respectively, as shown in Fig. l, and the respective branches terminate, one at the contacts 42 and the other at contacts 43 on both switches. The opposite battery terminal is connected by wire 62 to both contacts 46,

and contacts 43 are connected to each other.

Hence either one of the switch blades 41 can deliver any current which it receives to either magnet, but each. of the said blades 41 can only receive such current through the contacts 45, 46 ot' the opposite switch, and,

moreover, can only receive such current.

when the said contacts 45 and 46am closed by the presence of the corresponding switch blade 41 on its contact 43, since each spring 46 is connected to the opposite terminal of the battery F. Therefore, so long blade 41. of switch E for example, is in the position shown inFig. 1, e. on contact 43, the switch E can be used to energize either one of the magnets C and C as may be desired.

Thus it the door I) is open, as shown in Fig.-

1, the turning of the blade of switch E to contact 43 will close the circuit of magnet C thereby operating valve 13 to admit air pressure to the cylinder 2 for closing" the door. lYhen the blade of switch E is in engagement with the contact 43, the circuit is as""follows :trom the battery, through .magnet C", to contact 43 and blade of switch .FF at the; time. it is desired to operate switch E. (J. th closcddm'a condition. (When it is desired to 013 32! the door, the switch blade 41. ol switch I? mortal to the. position shown in Fig. 1 ol the drawings, in which position the circuit will be from battery l to magnet l. to contact 43 of switch l to Switch blade ll. to ontact 4". to contacts -l-5 and. *lli oi switch [5, to the battery I. it will be uiuler tood that in Fig. l, the

switches l1 and l? are on the opp site ends oi. the same car. and. the. blade ll of each switch is normally in position to close the switch E" are duplicated for switch 15.

circuit at contacts 45 and 46 when the other switch is to be ope 'ated. The circuits tor y this arrangement a motormanstanding, as is the custom, in elevated or subway cars, at the meeting point of two adjacent car platforms, can work the doors of both employing the front switch of the 1' air ca r and the rear switch of the forward car, either to open or to close the doors. It will be under" stood, of course, that more than one door motor can be supplied from pipes 11 and lYhat I claim as new and desire to secure by Letters Patent 1s:

1. The combination with a door motor of electromagnetic control valves for said rno-' tor and two controlling switches therefor located at separate points ot control, one switch being, normally in a predetermined position and the other being adapted to be manipulated. to serve to both open and close the door.

2. The combination 'witha door motor having electromagnctimill v controlled ports 'for each direction of door movement, oi two clectroinagnets and two controllingswitches therefor located atseparate points of CO]!- trol, one switch being normally in a predetermined position and the other being adapted to be manipulated to bOlZh'OPQIl'flIKl close t .loor.

3. .he combination with av door motor having electromagnetically controlled ports for each direction of door movement, two electromagncts operating on closed circuit to open the respective admission ports, and two switches located at 'sepa'raterpoints of'control, one switch being-normallyin apredeterniincd position and theother bcinga'dapted to be manipulated to-both open-and close the door.

4. The combination with a-door motor havinn clcctroinagnetically controlled valves, of two elcctroniagncts for the-opening and closing uiovenicnts respectively connected in multiple andtwo switches atseparate control points. one switch beingnormally' in a 1)redeterniincll position and the otherswitch being adapted to be manipulated to both open and close the-door.

5. The combination witha. door motor iucludingan operating-c vlindor and piston of an rlcctromagncl'ic control valve. th refor and two operating switches for said valve cimncrtcd thereto in. multiple, one switch being norim'illy 'ina prcdetcz'inined position and the other being adapted to-he maniptr hated to operate the door. and each. provided-with a. supplementary contact control ling l-lll current- [lowto-tlu' opposite switch (3. 'lhc combination with a door motor in eluding an op raling cylinder and piston. ol' an, chartroiuatxnvtir control valve thorc-- l'or. two sh lliilHH ontr lling said \alvruont switch living normally in a, prm lctornrinod-13 and an electric connection between the other terminal of the said magnet and each switch passing through contacts controlled by the opposite switch.

7. The combination with a door motor including an operating cylinder and piston, of an electromagnetic valve therefor, and two distinct switches controlling the magnet of said valve. one switch being normally in a predetermined position and the other being adapted to be manipulated by means of which the circuit of the magnet may be either opened or closed through contacts controlled by the opposite switch.

8. The combination with a door motor. of control valves therefor with the exhaust port normally open by spring pressure, two electromagnets serving when energized to close said exhaust port against the spring pressure tending to open it and two separately located switches. one switch being normally in a predetermined position and the other being adapted to be manipulated to energize one of the magnets separately tronrthe other.

9. The combination with a door motor, of two separate control valves therefor each having an exli-au'st port held normally open by spring: pressure and. an admission port held normally closed by spring: pressure, two closed-circuit magnets one tor each of said control-valves and two separately located switches. one switch being normally in a predetermined position and the other being adapted to be manipulated to energize one of the magnets separately from the other.

In witness whereof I have hereunto set my hand. before two subscribing witnesses, this 27th day of June 1912.

JAMES F. MCELROY.

Tlitnesses Y Heron-arr A. CAULKINS, Cnunaxcr; PALMER. 

